Merge #17599: ci: Run functional tests on s390x

fabd710 ci: Print free disk space (MarcoFalke)
fad9fdb test: Properly deserialize integers in little-endian (MarcoFalke)
fa94fc1 ci: Run functional tests on s390x (MarcoFalke)

Pull request description:

Top commit has no ACKs.

Tree-SHA512: 98ba77eb56f283131fdaeb393fda86cc308f1bf9781e1e0e5736b8d616528dc8ff2e494d55ba107c138083025c66a59e382fcfa9962d4349a5fd6cbbc52484c3

Author: MarcoFalke

.travis.yml

@@ -96,14 +96,14 @@ jobs:
         - set -o errexit; source ./ci/extended_lint/06_script.sh
 
     - stage: test
-      name: 'ARM  [GOAL: install]  [unit tests, functional tests]'
+      name: 'ARM  [GOAL: install]  [bionic]  [unit tests, functional tests]'
       arch: arm64
       env: >-
         FILE_ENV="./ci/test/00_setup_env_arm.sh"
         QEMU_USER_CMD=""  # Can run the tests natively without qemu
 
     - stage: test
-      name: 'S390x  [GOAL: install]  [unit tests, functional tests]'
+      name: 'S390x  [GOAL: install]  [bionic]  [unit tests, functional tests]'
       arch: s390x
       env: >-
         FILE_ENV="./ci/test/00_setup_env_s390x.sh"

ci/test/00_setup_env_s390x.sh

@@ -7,12 +7,9 @@
 export LC_ALL=C.UTF-8
 
 export HOST=s390x-unknown-linux-gnu
-export DOCKER_NAME_TAG=s390x/ubuntu:18.04
-export PACKAGES="clang llvm python3-zmq qtbase5-dev qttools5-dev-tools libssl1.0-dev libevent-dev bsdmainutils libboost-system-dev libboost-filesystem-dev libboost-chrono-dev libboost-test-dev libboost-thread-dev libdb5.3++-dev libminiupnpc-dev libzmq3-dev libqrencode-dev"
+export PACKAGES="clang llvm python3-zmq qtbase5-dev qttools5-dev-tools libevent-dev bsdmainutils libboost-system-dev libboost-filesystem-dev libboost-chrono-dev libboost-test-dev libboost-thread-dev libdb5.3++-dev libminiupnpc-dev libzmq3-dev libqrencode-dev"
 export NO_DEPENDS=1
 export RUN_UNIT_TESTS=true
-export RUN_FUNCTIONAL_TESTS=false
+export RUN_FUNCTIONAL_TESTS=true
 export GOAL="install"
 export BITCOIN_CONFIG="--enable-reduce-exports --with-incompatible-bdb"
-
-lscpu

ci/test/04_install.sh

@@ -72,6 +72,8 @@ if [ "$TRAVIS_OS_NAME" == "osx" ]; then
 else
   DOCKER_EXEC free -m -h
   DOCKER_EXEC echo "Number of CPUs \(nproc\):" \$\(nproc\)
+  DOCKER_EXEC echo "Free disk space:"
+  DOCKER_EXEC df -h
 fi
 
 if [ -n "$DPKG_ADD_ARCH" ]; then

test/functional/interface_rest.py

@@ -151,7 +151,7 @@ def run_test(self):
 
         bin_response = self.test_rest_request("/getutxos", http_method='POST', req_type=ReqType.BIN, body=bin_request, ret_type=RetType.BYTES)
         output = BytesIO(bin_response)
-        chain_height, = unpack("i", output.read(4))
+        chain_height, = unpack("<i", output.read(4))
         response_hash = output.read(32)[::-1].hex()
 
         assert_equal(bb_hash, response_hash)  # check if getutxo's chaintip during calculation was fine